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30 August 2008

Scanned from hardcopy.

National Security Agency

Fort George G. Meade, Maryland

SPECIFICATION NSA NO. 86-31D
4 MARCH 1988

NATIONAL SECURITY AGENCY SPECIFICATION

TEPACHE
INTERFACE CONTROL DOCUMENT
(ICD)

FOR OFFICIAL USE ONLY

1. INTRODUCTION

1.1 Scope

This document defines the functional, electrical and mechanical interface
of the TEPACHE embeddable communications security Key Generator Module. The
ICD is intended to serve the needs of the host system and item equipment
developer. This document contains the detailed technical information that
is required to integrate this communications security (COMSEC) module into
existing or future telecommunications systems and information processing
systems. System-unique security engineering guidance for the proper use of
the TEPACHE module in telecommunication equipment handling classified information
will be provided by the National Security Agency (NSA) on an individual
application basis.